SU1164416A1 - Method of preparing rock to breaking for entry-driving - Google Patents

Abstract

METHOD OF PREPARING MINING ROCKS TO DESTRUCTION WHEN PREPARING THE MINING OPERATIONS, including drilling a well in the center of the mine in the direction of penetration 1.5-2 times the daily penetration, impregnating the mountain massif with a surfactant using a pressure system with a hydraulic lock, o Considering that, in order to increase the rate of preparation of rocks for destruction by limiting the impact of the surfactant solution, before impregnating the rock mass with a surfactant solution, the miner in the mode of moistening of the rocks for the design contour of production, the wellbores are charged with charges of bristled substances with electric detonators of different degrees of deceleration installed in each charge, blasting of these charges in one step, then through the same well Injection of surfactant solution in wet mode, hydraulic dissection and hydrofluidization of rocks; moreover, both when injecting a mineral solution and a surfactant injection, a hydraulic lock in the well is located behind the zone of the reference rock pressure. "U

Description

The invention relates to the mining industry and can be used for drilling and blasting or combine harvesting methods of mining, workings.

A known method of preparing rocks for destruction during the excavation of mine workings, including drilling a well, placing and injecting fluid flj into the array through the well.

The disadvantage of this method is the low speed of mountain preparation for -. sort to the notch. '

There is also a method of preparing rocks for destruction during mining, including drilling, wells in the center, development in the direction of penetration 1.5-2.0 times longer than daily penetration, impregnating the rock mass through this well with a surfactant solution using pressure water trap systems [2J.

This method is characterized by a low rate of preparation of the rock mass, since the surfactant solution also affects the rocks outside the design loop. In addition, the impact of a surfactant solution behind the design circuit reduces the stability of the walls of the mine after it has been drilled.

The purpose of the invention is to increase the rate of preparation of rocks for destruction by limiting the amount of exposure to a surfactant solution.

This goal is achieved by the fact that according to the method of preparing rocks for destruction during excavation, comprising · 40 drilling a well in a development center in the direction of penetration 1.5-2.0 times longer than daily penetration, impregnating the rock mass through this a well with a surfactant solution using a pressure unit with a hydraulic shutter, before impregnating a rock mass with a surfactant solution through a well, a mineral binder solution is injected in the humid mode. niya breeds'a design contour of development ,. the wells are charged with explosive charges with the installation of a different deceleration stage in each charge of electric detonators, 55 these charges are blown up in one go, after which surfactant solution is injected through the same well in the mode of moistening, hydraulic separation and hydraulic fracturing, as in the case of injection of a solution mineral binder, and when injecting surfactants, a water seal in the well is located behind the zone of reference rock pressure.

The method is as follows.

In the bottom of the mine, a well with a length of 1, .5-2.0 times the daily penetration is drilled. Then, with the help of a pressure unit, a solution of a mineral binder is pumped into the massif through the well into the massif behind the design loop. Introducing into the massif along cracks and microcracks, the mineral binder solution fixes the massif both within the excavation part of the rocks and beyond, the sealing length should be not less than the length of the reference rock working pressure, usually not less than 2.0-2.5 m, the rest of the well is designed to filter the solution into the rock mass.

After completion of injection and extraction from the well of the discharge pipe with a water seal, dispersed is placed in the same well. explosive charges with detonators of various stages of deceleration and explode these charges. In this case, an induced crack formation zone is obtained in the fixed rock massif, and the diameter of the crack formation zone should be no more than the diameter (width, height) of the excavation.

The simultaneous explosion of explosive charges due to the interaction of shock waves contributes to better crack formation.

Then, a discharge pipe with a hydraulic shutter is placed in the well and, stepwise increasing the pressure in the modes of moistening, hydraulic separation and hydraulic fracturing of the rocks, the calculated amount of surfactant is pumped into the massif by the pumping unit, and when it appears on the bottom surface, impregnated with inert lot.

The use of the invention in industry allows to increase the speed of preparation of the rock mass for excavation both by the blasting method and by the combine method of mine excavation.

Claims (1)

METHOD FOR PREPARING ROCKS FOR DESTRUCTION DURING SURFACE DROPPING, including drilling a well in the center of the mine in the direction of sinking 1.5-2 times longer than daily drilling, impregnating the mining array through this well with a surfactant solution using a pressure unit with a water seal, about t characterized in that, in order to increase the rate of preparation of rocks for destruction by limiting the volume of exposure to a surfactant solution, before the impregnation of the rock mass with a surfactant solution through a well, a solution of mineral binder in the mode of moistening the rocks for the design circuit of the production, the well is charged with explosive charges with the installation of electric detonators of different degrees of deceleration in each charge, these charges are blown up in one go, and then surfactant solution is injected through the same well in the mode of moistening, hydraulic separation and hydraulic fracturing rocks, and both when injecting a solution of mineral binder, and when injecting a surfactant, a water seal in the well is located behind the zone of reference rock pressure. SU, "1164416> 1 And