——Record of green survey work of Shandong Zhengyuan Geological Exploration Institute of China Metallurgical Geology Bureau
◎ reporter Zhang Jiyong
In the former location of the rich iron ore resource deep project in Jinling mining area, Zibo City, Shandong Province, Nowadays, various crops such as corn and peanuts are lush and growing in good condition. It is hard to see that there used to be a rig tower that has experienced ten-million-ton iron ore resources exploration activities.
This is a good scene presented by Shandong Zhengyuan Geological Exploration Institute of China Metallurgical Geology Bureau (Zhengyuan Geological Exploration Institute for short) in recent years to vigorously implement green surveys and protect the ecological environment. The implementation of green exploration not only protects the environment, but also the mineral resources found are not to be underestimated. According to the target area delineated by the institute, through the summary of the mineralization law, a total of 31.08 million tons of potential resources are estimated.
On January 20, 2021, Ministry of Natural Resources issued the "Announcement on the Second Batch of Green Exploration Demonstration Projects", "In-depth and Peripheral Investigation and Evaluation of Rich Iron Ore Resources in Jinling Mine Concentration Area, Zibo City, Shandong Province". Listed among them. It is understood that this project is a new provincial geological survey project issued by the original Shandong Provincial Department of Land and Resources in 2018. Zhengyuan Geological Prospecting Institute firmly establishes the concept of "green water and green mountains are golden mountains and silver mountains", minimizes the negative impact of geological survey activities on the ecological environment, and carries out green survey work.
green prospecting area
The concept is the foundation of green prospecting
The leadership team of Zhengyuan Geological Exploration Institute attaches great importance to green prospecting work. They believe that the green survey may be more cumbersome than the previous work, but in the long run it will produce more extensive economic benefits. They called on all employees to take it seriously and actively coordinate all resources to support the preparations for green surveys.
At the beginning of the project, the institute established a project team with the project leader Cao Qichen as the leader of the green survey leading group and Jia Chongxun as the green survey specialist.There are drilling groups, geophysical prospecting groups, minerals groups, and surveying groups. Each group leader is responsible for the development and construction management of the green survey work of the relevant group, establishes the green survey responsibilities of personnel at all levels in accordance with the established organizational network, and strictly performs the supervision of the green survey.
In August 2018, the project team established the "Green Prospecting Management System" in accordance with the norms and standards of green prospecting; in September, it formulated the "Environmental Protection Plan".
In order to improve the construction quality of green surveys and form a green survey atmosphere of "everyone stresses environmental protection, everyone is environmentally friendly", on December 30, 2018, the project team organized construction personnel to carry out "establishing the concept of green development and ensuring green surveys" The "Goal" green survey theme signature activity, combined with the activities to carry out training and education work, has improved the awareness of all staff on green survey, let everyone understand the importance of green survey work, and further increase the enthusiasm for green survey construction.
In order to better implement various systems, raise the awareness of project team members on green survey work, and strengthen the operation specifications during the construction process, the project team carried out 5 education and training sessions before the start of construction. In the study of the "Green Prospecting Program", according to the different entry time of the personnel, we organized 4 studies of the "Green Prospecting Guide", focusing on the construction personnel and management personnel of the drilling rig 1#机台, 2#机台, 3#机台 respectively. Training has improved the environmental awareness of front-line personnel.
After the training is over, the project personnel participating in the training will be assessed. Those who fail the assessment will not be allowed to work and need to be re-trained. Technical clarification and education and training have laid an important foundation for the development of the project, improved the standardization of operations in the green survey construction process, and achieved the green survey goal of "everyone stresses environmental protection, everyone is environmentally friendly".
The key to implementation lies in strict management. In accordance with the requirements of the green survey, the project team developed a daily inspection system and a weekly meeting system. The project team conducts daily inspections of the drilling site during construction to ensure that there are no factors affecting environmental protection during the daily construction of the green survey; weekly meetings of the green survey are held regularly every week to summarize the green survey and inspection work of the previous week , And guide the green survey work next week to effectively control the overall progress of the green survey work.
Innovation is the key to green explorationDon't pre-empt it. "In order to steadily promote green survey work and standardize construction management, the project team sorted out the green survey work, and divided the green survey work into four major stages according to the construction characteristics and target tasks of each stage of the green survey, namely: preparation before construction Phase, construction management phase, post-construction recovery and treatment phase, summary and improvement phase, etc., fully grasp the green survey work process, and supplement and adjust according to the real-time situation.
In the field survey work, they try to use high-precision aerial magnetic survey, The airborne object detection volume system carries out the exploration work. The staff installs the detection instrument on the Little Squirrel B3 helicopter to form an airborne magnetic survey system. It flies along the survey line at a certain height and records the changes in the magnetic field. While ensuring the survey effect, the airborne magnetic Measure zero disturbance to ground vegetation, land, etc.
Before the start of the detection volume of objects, the project team will select appropriate instruments according to the needs of the green survey, and arrange the work at matching data collection points. In order to reduce the damage to arable land and crops, They chose to carry out geophysical gravity and magnetic operations during the vacant summer farmland after the wheat harvest, and used a variety of methods to ensure that the cultivated land was not affected. For example, the controllable source audio magnetotelluric sounding method was selected for construction, and the electrode pit was formed. The cross-sectional area is 0.5m×1m, and the depth is 0.5~1m. After the test, the restoration will be completed on the spot.
When measuring the 1:2000 gravity profile, the project team uses the CG-5 fully automatic land gravity with a small footprint and high work efficiency. In the drilling construction, the project team prioritizes the selection of non-farmland areas to reduce the damage to arable land and crops; electric-driven drilling rigs are used to reduce air pollution During drilling, in the formations with relatively complete cores and less rock powder, they used clean water to drill, which not only reduced the cost, but also reduced the production of mud; for the layers where mud must be used, choose easy-to-decompose and non-polluting layers Environmentally friendly mud minimizes the impact on the environment.
For the large amount of magma produced, the project team used iron sedimentation tanks and stainless steel circulation tanks instead of mortar mud sedimentation tanks and drilling fluid circulation tanks to avoid leakage and other problems; collect them in time After the completion of the construction, the remaining rock dust, drilling fluid, etc., to prevent the drilling fluid from affecting the surrounding environment and soil. In order to ensure the stability of the local hydrological characteristics, the hydrological form remains unchanged, after the completion of the hole,The staff will also perform full-hole sealing on the drilled hole.
Project team leader Cao Qichen introduced: "The new methods and new materials used in the drilling work did not affect the surface water and groundwater, and effectively protected the surface water and ground hydrology in the area."
Drilling restoration and treatment completed Afterwards, the project department and the Jinan Institute two-level expert group carried out the green survey work quality acceptance, and the quality rating was based on the completion of the four aspects. In the end, the green survey quality of the five boreholes all reached the "good" grade.
Responsibility is the soul of green prospecting
Attitude determines everything, details determine success or failure. After many studies and education, the project team members' awareness of environmental protection has increased day by day. In addition to doing their best to reduce the impact of construction on the environment, they also always pay attention to the various types of garbage generated during the operation. Classification processing.
In order to ensure that the local environment remains intact as before, the project team conducted a special green survey on the site for special acceptance, and assigned special personnel to rectify the problems found to ensure that all solid waste at the construction site was removed and transported out of the site.
After the garbage in the site is cleaned up, the project team will restore the land type of the site as required-agricultural land is reclaimed by deep rotary tillage, and the land is irrigated and fertilized many times to ensure that the cultivated land is restored to its previous fertility; non-agricultural The way the land is used to restore the original topography and topography ensures the "three connections and one leveling".
As we all know, harmonious survey is an important part of green survey. After drilling and construction, the project team invited local residents to jointly inspect the restoration and governance, make rectifications according to the requirements of the residents, and continue to track the growth of crops to ensure that the restoration and governance of the land meet the requirements of the people.
Sincerely, gold and stone are open. Zhengyuan Geological Prospecting Institute held aloft the banner of green exploration in the deep project of rich iron ore resources in the Jinling ore concentration area, stepping on the field of environmental protection, and stepped out of the "model road" of green exploration by Chinese metallurgical and geological prospecting units. In the next step, the institute will continue to develop new green prospecting technologies and processes to make the green prospecting business bigger and stronger.
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