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Goaf overlaying basic top rock stratum dynamic settlement amount observation device and method

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

Active Publication Date: 2019-02-01
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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  • Goaf overlaying basic top rock stratum dynamic settlement amount observation device and method
  • Goaf overlaying basic top rock stratum dynamic settlement amount observation device and method
  • Goaf overlaying basic top rock stratum dynamic settlement amount observation device and method

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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

The invention discloses a goaf overlaying basic top rock stratum dynamic settlement amount observation device and method, and belongs to the technical field of mining pressure observation of coal mines. The device comprises a measuring unit, a transmission unit and a receiving unit, wherein the measuring unit is a measuring sensor probe; during actual observation, the measuring sensor probe is installed in a test drilling hole, and comprises a resin medical bag, a displacement sensor, a fixing mechanism and a fastening claw; the measuring sensor probe is used for fixing the displacement sensorand the rock stratum where the displacement sensor is located to move along with the rock stratum at the same time, and observing and recording the settlement amount of the rock stratum and performing real-time analysis on the movement condition of the rock stratum through a data receiver; the transmission unit comprises a data transmission wire and a flexible protective tube used for protectingthe data transmission wire, wherein the data transmission wire is located in the flexible protective tube; and the receiving unit comprises the data receiver, wherein the data receiver is provided with a plurality of transmission channels. According to the device and the method, technical support can be provided for supporting design of the roadway, gob-side entry retaining, rock covering controland the like.

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 Applications(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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