Method for controlling water-blocking stability of mining overlying strata seepage isolation belt
A technology of stability control and isolation zone, which is applied in ground mining, mining equipment, earthwork drilling and mining, etc., can solve the problems of lack of suitable methods for overburden rock barrier water, and achieve the effects of avoiding excessive cost, accurate control, and accurate judgment
Active Publication Date: 2022-01-14
CHINA UNIV OF MINING & TECH +1
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Problems solved by technology
However, at this stage, how to determine the safe mining parameters of continuous mining and filling, and how to ensure the stability of the overlying rock barrier water still lacks a suitable method
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Embodiment 1
[0081] Taking a working face in the second panel area of Wangtaipu Coal Mine as an example, the control method of continuous mining, continuous filling and water conservation coal mining based on the given deformation of the filling body is described in detail.
[0082]Implementation case The average buried depth of the working face is about 220m, the strike length is about 300m, and the dip length is about 160m. The mined coal seam is XV coal, located in the Carboniferous Taiyuan Formation (C 3t ), the average thickness is about 2.5m, the maximum thickness is close to 3m, and the inclination angle is 1°~8°. It is a near-horizontal coal seam. This patent can be implemented in this mining geological condition.
[0083] Step 1. According to the above mining geological conditions, it is preliminarily determined that the double-wing arrangement of stope branch roads in the continuous mining and continuous filling working face, the width of the stope branch roads is 6m, and is di...
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The invention discloses a method for controlling the water-blocking stability of a mining overlying strata seepage isolation belt, and relates to the field of coal mining. The method comprises the steps that the initial stress characteristics of a bearing filling body are analyzed to obtain initial damage information of the bearing filling body, and a creep equation is used for calculating the long-term deformation rule of the continuous mining and continuous filling bearing filling body; whether the bearing filling body is damaged and loses stability or not is judged according to whether the initial damage and creep deformation rule exceeds the design deformation amount of the filling body or not; mining parameters are modified or the filling material ratio is adjusted according to needs to improve the supporting strength of the bearing filling body, and the first deformation constraint condition of the bearing filling body is given; the second deformation constraint condition of the bearing filling body is given by judging the water-blocking stability of the bearing filling body, and when the deformation of the bearing filling body meets the dual constraint conditions of the bearing stability of the bearing filling body and the water-blocking stability of the seepage isolation belt, the water-blocking stability of the mining overlying strata seepage isolation belt can be controlled. The steps are simple, the control effect of the mining overlying strata seepage isolation belt is good, and implementation can be fast and convenient.
Description
technical field [0001] The invention relates to a method for controlling the permeability of mining overlying rock, in particular to a method for controlling the water blocking stability of mining overlying rock seepage isolation zone used underground in coal mines. Background technique [0002] Water conservation coal mining is an important way to solve the coordinated development of coal mining and ecological environment protection. After nearly 30 years of development, a relatively systematic theoretical system of water-retaining coal mining technology has been initially formed in my country. In comparison, filling mining is an effective water-retaining coal mining method, which is mainly divided into longwall filling mining and roadway pillar filling mining. However, the above two methods of backfill mining face limitations such as the mutual restriction of mining and filling operations and the low rate of coal recovery. [0003] At present, my country's mines are gene...
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IPC IPC(8): E21C41/18E21F15/00G06F30/20G06F111/04G06F119/14
CPCE21C41/18E21F15/00G06F30/20G06F2111/04G06F2119/14
Inventor 马立强王烁康许玉军范立民程敬义周楠
Owner CHINA UNIV OF MINING & TECH