SU1453025A1 - Roof control method - Google Patents

Abstract

The invention relates to mining. The goal is to increase the efficiency of the roof management process in the clearing workings. In the zavalny part of the lava at a certain distance from the clearing bottom line from the side of the excavation workings into the soil of the reservoir at a certain angle to the surface of the bed of wells of a certain length at a calculated distance from one another. The explosive charge is placed in the wells and blown up. As a result of blasting explosives charges of the soil, the rocks turn out to be significantly loosened and broken by a network of cracks, as a result of which they have a larger active surface than in the massif. After that, at the mouth of each well, fluid is injected through the gates and causes swelling and swelling of the soil rocks until they are completely closed with the top of the reservoir.

Description

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The invention relates to mining and can be used to improve the efficiency of roof management and the safety of mining operations in the Refining Mine of coal mines.

The aim of the invention is to increase the Efficiency of the blood management process in the clearing workings.

To carry out the method in the dammed part of the lava at a certain distance from the clearing bottom from the side of the excavation workings into the soil of the formation at a certain angle to the surface of the bedding (1 t a number of wells of a certain length at a calculated distance from one another. B: explosive charge and explosion-) t. The angle of inclination, the length of the wells, the distance between them in the row and the magnitude of the explosive charge in each particular case is chosen depending on the physicomechanical properties of soil rocks and the technology of clean work in such a way as to achieve uniform destruction | eni) rocks of the soil in the developed space. to a depth of 6–8 m. As a result, the E explosives (simultaneous from both centers) of explosives of the soil rock appear to be significantly loosened and cracked by a network of cracks, as a result of which They occupy a larger volume and have a larger active surface than in the massif.

Thereafter, at the wellhead of each well, through the gates it is injected under pressure

liquid (for example, water) for moisture saturation of loose rock.

It was established experimentally that rocks such as shale, mudstones, some types of sandstones and a number of others, absorbing water, swell, increasing in volume within 5–20 hours to 3–15%. At the same time, the rock retains a sufficient bearing capacity and, in addition, due to the increase in volume, internal stresses arise upon swelling, which according to laboratory tests are 1-5 MPa.

Thus, as a result of the intensive swelling of the soil rock after a certain time, determined by their physicomechanical properties, they fill the developed space more tightly, while providing active roof retention.

Claims (1)

Invention Formula The method of roofing, which includes drilling wells into the soil of a bed of pulling rocks, loading wells with explosives and blasting them, is characterized in that, in order to increase the efficiency of the roof control process in the clearing workings, after blasting, loose rocks inject fluid and cause swelling and swelling soil rocks to complete closure of the roof of the reservoir.