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Observation device and method for the dynamic settlement of the basic roof overlying the goaf

The invention relates to an observation device and a basic roof technology, which is applied in the field of observation devices for the dynamic settlement of the rock strata overlying the basic roof in a goaf, and can solve the problems of intuitive observation of the basic roof settlement and settlement law, and difficulty in direct access for personnel and equipment.

Active Publication Date: 2019-10-08
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

Since the violent movement of the basic roof is generally located within the upper range of the goaf behind the working face, it is difficult for personnel and equipment to directly enter, so there is no good method to directly measure the settlement amount and settlement law of the basic roof above the goaf. Intuitive observation

Method used

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  • Observation device and method for the dynamic settlement of the basic roof overlying the goaf
  • Observation device and method for the dynamic settlement of the basic roof overlying the goaf
  • Observation device and method for the dynamic settlement of the basic roof overlying the goaf

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Embodiment 1

[0045] The engineering geological conditions include: a working face adopts double-entry tunneling method, the width of the protective coal pillar in the middle section is 10m, the thickness of the coal seam mining at the working face is 2m, the immediate top 15 rock layer is weak mudstone with a thickness of 2.5m, and the basic top rock layer is Medium-strength siltstone, thickness M=8m, rock density γ=26kN / m 3 , The tensile strength of rock formation δ=5.8MPa.

[0046] combine Figure 3 to Figure 6 As shown, the observation method of the present invention specifically includes the following steps:

[0047] a. Select the coal mining face 18 of the double-lane excavation as the research object. After the cut hole of the previous working face is penetrated, in the parallel groove of the next working face (this parallel groove and the parallel groove of the upper working face are reserved with section coal pillars) 11, the width of the coal pillar is 10m), select a suitable lo...

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Abstract

Disclosed are a device and method for observing a dynamic settlement amount of a basic roof stratum overlying a goaf, pertaining to the technical field of coal mining and mine pressure observation. The device comprises a measurement unit, a transmission unit, and a receiving unit. The measurement unit is a measurement sensor probe. During observation, the measurement sensor probe is mounted in a test borehole. The measurement sensor probe comprises a resin cartridge, a displacement sensor, a fixing mechanism, and a fastening claw. The displacement sensor of the measurement sensor probe is fixed to a stratum at which the probe is located, and moves together with the stratum. The measurement sensor probe monitors and records a settlement amount of the stratum in real time, and performs real-time analysis of a motion status of the stratum by means of a data receiver. The transmission unit comprises a data transmission wire and a flexible protection tube for protecting the data transmission wire. The data transmission wire is located in the flexible protection tube. The receiving unit comprises the data receiver. Multiple transmission channels are provided in the data receiver. The invention provides technical support for roadway support design, a gob-side entry retaining, overlying rock control, etc.

Description

technical field [0001] The invention belongs to the technical field of mine pressure observation in coal mine mining, and in particular relates to an observation device and method for the dynamic settlement amount of a basic top rock layer overlying a goaf. Background technique [0002] The theory of mine pressure and control points out that after the coal seam is mined, the overlying strata will undergo different degrees of subsidence and fracture damage, which is the main reason for the appearance of mine pressure in the stope. Since the beginning of the last century, many scholars have put forward different theoretical hypotheses for the movement of the overlying rock strata, such as the cantilever beam hypothesis proposed by Germany's Stocker, the hinged rock hypothesis proposed by Kuznetsov of the former Soviet Union, and the Chinese scholar Qian Minggao. The masonry beam theory proposed by the academician and the "transfer rock beam" theory proposed by the academician ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 黄万朋辛光明武凯郭晓胜
Owner SHANDONG UNIV OF SCI & TECH
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