Key layer breaking area determination method

A technology of area determination and key layer, applied in earthwork drilling, measuring devices, instruments, etc., can solve the problems of high cost, long time, low efficiency, etc., and achieve the effect of reducing determination cost, saving determination time, and improving determination efficiency

Inactive Publication Date: 2020-07-03
SHENHUA SHENDONG COAL GRP
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

During the process of implementing this application, technical R&D personnel found that the method of determining the fractured area of ​​the key layer by drilling takes a long time and has low efficiency, it is difficult to determine the fractured area in time, and the cost is high

Method used

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  • Key layer breaking area determination method

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Embodiment Construction

[0017] The technical solution of the present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.

[0018] figure 1 Shows the flow chart of the method for determining the broken area of ​​the key layer of the present application, such as figure 1 As shown, the key layer fracture region determination method provided by the present application includes:

[0019] S100, determine the rapid subsidence area of ​​the ground surface;

[0020] The subsidence velocity of the rapid surface subsidence area is greater than that of the normal subsidence area.

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Abstract

The invention discloses a key layer breaking area determination method. The method comprises steps of determining a rapid ground surface settlement area; acquiring a rock movement angle; determining the position of a key layer; and extending an edge line of an earth surface rapid settlement area towards the key layer according to a rock movement angle, the extended edge line intersecting with thekey layer to form a boundary line, and the area in the boundary line being a key layer breaking area. The method is advantaged in that the key layer breaking area does not need to be delineated in a drilling mode, the determination time of the key layer breaking area can be saved, determination efficiency is improved, and determination cost is reduced.

Description

technical field [0001] The present application relates to the technical field of coal mines, and in particular to a method for determining the fractured area of ​​a key layer. Background technique [0002] The key layer refers to the rock formation that controls the local or all rock formation activities of the overlying strata on the stope. The key layer is the main pressure-bearing structure in the overlying strata, and the rupture of the key layer will have a direct impact on the pressure distribution of the entire goaf. [0003] At present, the main basis for identifying the key layer is the deformation and fracture characteristics of the rock, and the deformation and fracture of the rock, as well as the fractured area of ​​the key layer, are mainly delineated by drilling. During the process of implementing this application, technical researchers found that the method of determining the fractured area of ​​the key layer by drilling takes a long time and has low efficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C5/00E21F17/00E21B47/00E21B49/00
CPCE21B49/00E21F17/00G01C5/00
Inventor 杨俊哲杨新林周成军王博
Owner SHENHUA SHENDONG COAL GRP
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