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Monitoring method and barrier for ecological water source disturbance caused by overlying strata mining separation layer expansion

A delamination and ecological technology, which is applied in the direction of fluid pressure measurement, measurement, and instruments using optical methods, can solve the problems of inability to realize ecological direct water supply and reserve water source disturbance monitoring, and simultaneous monitoring, so as to eliminate ground temperature interference, The effect of low cost and accurate test results

Active Publication Date: 2020-03-06
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a monitoring method and a barrier for ecological water source disturbance caused by overburden mining and layer expansion, so as to solve the problem that existing monitoring methods cannot monitor underground multi-layer aquifers in the same monitoring hole. Simultaneous monitoring, unable to achieve separation layer expansion, monitoring of ecological direct water supply and reserve water source disturbance

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  • Monitoring method and barrier for ecological water source disturbance caused by overlying strata mining separation layer expansion
  • Monitoring method and barrier for ecological water source disturbance caused by overlying strata mining separation layer expansion
  • Monitoring method and barrier for ecological water source disturbance caused by overlying strata mining separation layer expansion

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Embodiment 1

[0061] A specific embodiment of the present invention discloses a method for monitoring ecological water level changes caused by overburden mining and separation layer expansion. figure 1 A flow chart of the monitoring method is shown, specifically including the following steps:

[0062] S1. Determine the lithology and vertical structure characteristics of the overlying strata on the coal mining face.

[0063] The lithology and vertical structure characteristics of the overlying strata on the coal mining face are determined according to the methods of ground drilling coring, borehole TV imaging or drilling test curves. Layer expansion area. During the mining process of the coal seam, the overlying strata on the coal mining face form water-conducting fracture areas and separation layer expansion areas from bottom to top. In this step, it is necessary to determine the stratum lithology, the thickness of different lithology strata, and the water-conducting fracture areas and sep...

Embodiment 2

[0123] Yet another embodiment of the present invention differs from Embodiment 1 in that in step S4, after the installation of the osmotic pressure sensor is completed, the method of setting a barrier between the monitored aquifer and the non-aquifer is different. This embodiment uses a barrier Block hydraulic connections between monitored aquifers.

[0124]Use barriers to separate different monitoring aquifers. The layout of the barriers includes the following methods: The first layout method is to set up two barriers for each layer of monitoring aquifers. The blocker is arranged in the center of the underlying rock layer, or the blocker is arranged at the lower part of the overlying rock layer of the monitoring aquifer and the upper part of the underlying rock layer, and the blocker does not hinder the water flow within the height range of the aquifer; the second arrangement Each layer of monitoring aquifer is equipped with a blocker, and the blocker is arranged at the centr...

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Abstract

The invention relates to a monitoring method and a barrier for ecological water source disturbance caused by overlying strata mining separation layer expansion, belongs to the technical field of groundwater monitoring, and solves the problem that an existing monitoring method cannot simultaneously monitor multiple underground water-bearing strata in the same monitoring hole. The monitoring methodcomprises the following steps: determining the lithology and vertical structural characteristics of overlying strata on a coal face, determining the monitoring water-bearing strata and the buried depth and thickness thereof, and drilling a monitoring hole; determining the burying position of an osmotic pressure sensor, and mounting the osmotic pressure sensor in the monitoring hole; arranging an interlayer between the monitoring water-bearing strata and the non-water-bearing strata to block the hydraulic connection between the monitoring water-bearing strata; collecting water pressure data ofthe monitoring water-bearing strata to obtain a water pressure change curve of each monitoring water-bearing strata; and judging whether an underground separation reservoir is formed at the bottom ofeach monitoring water-bearing stratum or not according to the water pressure change curve of each monitoring water-bearing stratum. The monitoring method is simple and practical, and multiple water-bearing strata can be monitored at the same time in the same monitoring hole.

Description

technical field [0001] The invention relates to the technical field of ecological protection, in particular to a monitoring method for ecological water source disturbance caused by overlying rock mining and separation layer expansion. Background technique [0002] Due to the gradual depletion of coal resources in the eastern region of my country, the westward shift of coal production strategy will continue to accelerate, so the coal mining volume in the west will increase year by year. It is estimated that the coal production in the west will account for more than 70% of the country's total coal production in the future. For example, the Jurassic coal seams in the Ordos Basin have huge reserves, good coal quality, and broad mining prospects. However, there are extremely thick sand-mudstones (thickness 200-400m) of the Luohe Formation of the Cretaceous and Anding Formation of the Jurassic in the overlying rocks. The combination of layered rock strata, coupled with the mining ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/002E21B47/06E21B47/07E21B49/00G01K11/32G01L11/02G01K11/3206
CPCE21B47/00E21B47/06E21B49/00G01L11/025G01K11/3206
Inventor 李文平陈维池杜家发王启庆范开放
Owner CHINA UNIV OF MINING & TECH
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