Dynamic detection method for mine mining-induced fracture

A dynamic detection and fracture technology, applied in surveying, earthwork drilling, wellbore/well components, etc., can solve the problems of increasing the rationality of hole layout, prolonging the extraction time, blind hole layout, etc., to increase the rationality of hole layout. , the effect of prolonging the extraction time and reducing the possibility

CN102155213BActive Publication Date: 2013-06-05XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2013-06-05

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Abstract

The invention discloses a dynamic detection method for a mine mining-induced fracture. The difficulty and blindness of gas drainage level position gives rise to problems that the level position of the gas drainage borehole arrangement is too high, the mining-induced fracture is underdeveloped, the gas drainage difficulty is big and the efficiency is low; the excessive lower level position of the gas drainage borehole arrangement easily gives rise to problems that a working surface seriously leaks wind, the normal running of a mine ventilation system is affected, the stability of the rock stratum is bad, and the effective gas drainage time is short. The method comprises the following steps of: detecting positions, parameters and numbers of boreholes by design; constructing before mining a stopping line and detecting the boreholes, carrying out the water leakage detection and recording data; taking a vertical height as a standard to normalize detection data, forecasting the development height of the mining-induced fracture after different mining times. The method can improve conditions of blind hole arrangement, short service life and low efficiency aiming at high position gas mining, increases the reasonableness of the hole arrangement and prolongs the mining time; and the method is beneficial to the scientific formulation of an under-water-body mining system, reduces the possibility of water outgoing of the water body, reduces the cost of coal mining and gas mining and improves the economic efficiency.
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Description

technical field

[0001] The invention relates to a dynamic detection method for mining cracks in mines. technical background

[0002] As more and more mines go deep, the hazards and prevention of mine gas are more important. Aiming at gas, which is a major disaster source in mines, many mines have established mine gas drainage systems as a fundamental measure to solve mine gas disasters. . The high-level gas drainage technology developed for gas control in adjacent and local coal seams will undoubtedly be an effective measure to solve the excessive gas gushing in the process of mine recovery, but due to the difficulty and blindness of the selection of drainage layers, high-level drainage The drilling arrangement is unreasonable, the cost is high, the efficiency is low, and the great waste of human resources and property is mainly due to the insufficient understanding of the development dynamics of the mining fracture zone in the mine, which has caused or because the stratum ...

Examples

Embodiment Construction

[0024] The present invention will be described in detail below.

[0025] Concrete technological process of the present invention is as follows:

[0026] The first step: design the required detection drilling location, parameters and quantity.

[0027] According to the downhole conditions, choose a suitable location for construction and detection of drilling pits. Generally, it is selected near the designed recovery line, and the vertical plane where the recovery line is located is used as the detection object to ensure that there is enough time to complete the drilling construction and detection tasks, and to ensure that the detection can be completed. The drilling rig, electricity, water pressure and space required for the task; design the aperture, length, azimuth and elevation of the detection borehole according to the location of the drilling hole, the performance of the drilling rig, and the distance and azimuth of the target to be detected. They are all parallel to the ...