Actual measurement method for influence range of advance support pressure of working face
A technology with advanced support and influence range, applied in force/torque/work measuring instruments, measuring devices, instruments, etc., it can solve the problems of inaccurate data analysis, low precision, and untimely data recording by workers, and achieve anti-interference. The effect of strong ability, intuitive observation results, and wide practicability
Inactive Publication Date: 2018-11-13
SHENMU LONGDE MINING IND
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Problems solved by technology
When the borehole stress gauge monitoring method is used to measure the influence range of the leading bearing pressure on the working face, it is greatly affected by factors such as surrounding rock, instruments, and installation, and is prone to large errors; when the mobile observation method of the surface displacement of the roadway is actually measured, workers To record data on time, there are often problems such as inaccurate data analysis caused by workers not recording data in time and with low precision. The above two methods are time-consuming and labor-intensive, and the actual measurement results are not intuitive.
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Embodiment
[0018] The present invention provides the following technical solutions: a method for measuring the influence range of the leading support pressure on the working face, comprising the following steps:
[0019] S1: Drill several observation boreholes 2 on the coal and rock mass 1 at intervals a from near to far from the working face;
[0020] S2: Place the peeping camera 3 of the back-rock drilling peeping instrument 5 inside the observation borehole 2, and the peeping camera 3 is electrically connected to the back-rock drilling peeping instrument 5 through the wire 4. Through the back-rock drilling peeping instrument 5, each The surrounding rock fragmentation range in observation borehole 2;
[0021] S3: According to the limit equilibrium theory, the scope of the roadway surrounding rock crushing zone is as follows: In the formula: p---surrounding rock pressure; p i -- support resistance; c --- cohesion of rock mass; --- The internal friction angle of the rock mass; a ---...
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The invention discloses an actual measurement method for the influence range of the advance support pressure of the working face, comprising the following steps: S1, drilling several observation holesin the coal rock body every a certain distance a from the near to the distance from the working face; S2, placing a peeping camera of a back to rock drilling peeping instrument inside the observationholes, electrically connecting the peeping camera to the back to rock drilling peeping instrument through a wire, and actually measuring the surrounding rock fracture range in each observation hole by the back to rock drilling peeping instrument. The method can accurately and effectively measure the influence range of the advance support pressure, thereby providing a guiding role for the top coalcavibility of the top coal, the stability of the coal wall of the large mining height working face, and the strengthening support of the ahead mining section of the stope face; and the method has thecharacteristics of intuitive observation, convenient operation, strong anti-interference ability and adjustable precision, and has wide practicality.
Description
technical field [0001] The invention relates to the technical field of working face mining, in particular to a method for actually measuring the influence range of the leading bearing pressure on the working face. Background technique [0002] After the working face is mined, the overlying strata will be damaged and moved, which will cause the redistribution of the stress in the stope and form an advanced bearing pressure in front of the working face, which will have an important impact on the destruction of the coal seam in front of the stope and the deformation and movement of the mining roadway. The actual measurement of the influence range of the advanced support pressure is very important, and it is of great importance for the next step to study the caving performance of the top coal in the top coal caving, the stability of the coal wall of the large mining height working face, and the reinforced support of the leading section of the mining face. guiding role. [0003]...
Claims
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IPC IPC(8): G01L5/00
CPCG01L5/00
Inventor 张勇冉星仕马清水任崇鹏李玺
Owner SHENMU LONGDE MINING IND