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A method for determining the safety range of the working face for floor karst water damage ground area control

A surface area, safe range technology, used in surface mining, underground mining, earth-moving drilling, etc.

Active Publication Date: 2021-09-14
HEBEI COAL SCI RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no method for determining the safety range of the working face for water hazard ground area control in North China coalfields

Method used

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  • A method for determining the safety range of the working face for floor karst water damage ground area control
  • A method for determining the safety range of the working face for floor karst water damage ground area control
  • A method for determining the safety range of the working face for floor karst water damage ground area control

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Embodiment Construction

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely intended to illustrate the invention and are not intended to limit the invention.

[0036] See Figure 1 to 6 A floor karst water of the present invention is now provided a safe range harm ground Face Control area determination method will be described. The ground floor area karst water hazard safety range determining method is applicable to treatment Face North China coal. Coal Mining Face is defined by 3, 2, and cut in a rectangular area enclosed by the side of the eye along the groove trough, which is also called the main Cut Cut, also known as the secondary side cut in the eye.

[0037] figure 1 Shows a floor according to the present invention provi...

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Abstract

The invention provides a method for determining the safety range of a floor karst water damage ground area control working face, which belongs to the technical field of water prevention and control in North China type coal fields. The method includes obtaining analytical data of mined coal seams; Analyzing the data and the formula for calculating the width of the waterproof coal pillar to obtain the width of the waterproof coal pillar; obtain the limit; obtain the safety range of the treatment working face. The method for determining the safety range of the working face for controlling the floor karst water damage ground area provided by the present invention can obtain the limit and finally determine the control work based on the analytical data of the mining coal seam, the calculation formula of the width of the waterproof coal pillar, and whether the relevant working face has a fault structure. The surface safety range provides a guiding basis for the treatment of the karst water-damaged ground area on the floor of North China coalfields.

Description

Technical field [0001] The present invention belongs to the North China coal BACKGROUND Control of water, more particularly, it relates to a floor surface area of ​​Karst water hazard safety range determination method Face Control. Background technique [0002] At present, North China coal resources has basically dried up shallow, most of them into the deep, deep seam of coal mining when faced with "stress Highland, Highland temperature, high pressure and large floor failure disturbance" very complicated mining conditions. In the coal mine seam floor grouting drilling implement reform, due to the large water pressure, we can not guarantee the safety of operations, so the floor Ordovician limestone karst aquifers threaten the safety of mining coal seam grouting reconstruction of regional governance in the ground using a directional drilling technology, create conditions for safe production. The main object of the control area is blocked from the ground aquifer ash roots and Austri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18E21F17/00G06Q50/02
CPCE21C41/18E21F17/00G06Q50/02
Inventor 张党育蒋勤明高春芳王铁记王玺瑞
Owner HEBEI COAL SCI RES INST