Coal mining method under high-voltage transmission line

A technology for high-voltage power transmission lines and coal mining methods, applied in underground mining, mining equipment, surface mining, etc., can solve problems such as unavailability of coal resources, and achieve the effects of saving work preparation time, reducing processes, and stabilizing roof structure

Active Publication Date: 2021-04-16
BEIJING TIANDI HUATAI MINING MANAGEMENT CO LTD +1
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  • Claims
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Problems solved by technology

In the existing technology, there is no mature prevention and control scheme for mining under high-voltage transmission lines, and a large number of valuable coal resources cannot be utilized

Method used

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  • Coal mining method under high-voltage transmission line
  • Coal mining method under high-voltage transmission line

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Embodiment Construction

[0027] A coal mining method under a high-voltage transmission line, see figure 1 Shown, this coal mining method is to take two or more than two line spans as a section, with the pattern alternate operation of mining one section and filling the other section. figure 1 Shown is a schematic diagram of the mining of a line span and half of the line span before and after it. The specific operation steps are:

[0028] In the first step, two inner and outer circles of grouting holes 5 are drilled around each high-voltage electric tower and poured with cement slurry to construct a protective isolation wall for the base of the high-voltage electric tower. The hole distance of the primary grouting hole is not more than 5m, and the hole positions of the inner and outer rings are staggered. The distance between the protective partition wall and the base of the electric tower is between 15 and 20m. The protective partition wall goes deep into the ground from the ground and penetrates the...

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Abstract

The invention discloses a coal mining method under a high-voltage power transmission line. According to the coal mining method, two or more line spans are taken as a working section, alternate operation is conducted in a mode that one working section is mined and one working section is filled, and the coal mining method comprises the specific steps that 1, primary grouting holes are drilled around a high-voltage electric tower, and cement paste is poured; 2, coal mining upper and lower roadways and forward and reverse driving working faces are excavated in a coal seam under the line; 3, mining and filling operation is carried out on the forward and reverse tunneling working faces in turn, paste filling is carried out once every 2.5-3 m of tunneling, and protection coal pillars of 5 m or above are reserved between the forward and reverse working faces located within the same line span; 4, paste is used for sealing and filling upper and lower roadways and the tunneling working face in a mining completed section; 5, secondary grouting holes are drilled, clay or mortar is poured, and a gap between the coal seam roof and the filling paste is filled; and 6, the step 1-5 is repeated, and the work of the next section is carried out. According to the coal mining method under the high-voltage power transmission line, safe coal mining under the high-voltage power transmission line is realized, and more precious resources can be replaced.

Description

technical field [0001] The invention relates to a coal mining method under a high-voltage transmission line. Background technique [0002] The eastern region of my country is economically developed, with dense high-voltage transmission lines, and a large amount of coal resources stagnate underground. In order to ensure the safety of power grid operation, the country has formulated very strict control standards for coal mining under high-voltage transmission lines, including: the inclination of main facilities of overhead lines located in the area affected by mining, including towers, shall not exceed 15‰, and the inclination of cross-arms shall not exceed 15‰. more than 10‰; the slack error of conductors and lightning conductors shall not exceed 5℅; the deflection of straight tower pole insulators in series along the line direction shall not exceed 15℅, etc. The inclination and horizontal movement of the ground surface in the mining-affected area are the main factors causin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21F15/00E21F17/103
CPCY02W30/91
Inventor 胡兴涛郑光辉朱涛代双成邢旭东苏继敏刘炳权赵宏伟袁小浩刘小哲高运增肖建
Owner BEIJING TIANDI HUATAI MINING MANAGEMENT CO LTD
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