SU1035220A1 - Method of hydraulic mining of thick steep coal seams - Google Patents

Description

The invention relates to the mining industry and is intended for the hydraulic development of powerful steep coal seams.

A known method of developing coal seams (1]. '5

There is also known a method for the hydraulic development of powerful steep coal seams, including carrying out preparatory workings, excavating the layers of coal with the primary extraction of U from the lay drift at the lying side of the seam and transferring the excavation machine from layer to layer at the boundary of the extraction section, laying the worked out space with a hardening mixture [2 ].

Known methods are characterized by lack of effectiveness.

The aim of the invention is to increase the development efficiency by reducing the cost of fastening, reducing development time and improving safe working conditions.

This goal is achieved by the fact that according to the method of hydraulic development of powerful steep coal seams, including carrying out preparatory workings, excavating layers of coal with priority excavation from the lay drift at the lying side of the seam and transferring the excavation machine from layer to layer at the boundary of the excavation 30 site, laying out worked out spaces with a hardening mixture, the layers are taken out in an ascending order by strips oriented normal to the layer drift at the lying side of the formation, while the last two strips are taken out with a rise of half the thickness of the layer in the opposite direction with a slope i determined by the formula ^{i =} where h is the thickness of the layer, m;

m is the thickness of the reservoir, m;

ct - dip angle, degrees; B - the width of the lay drift, m. The method consists in the following.

in

The development of the main and. ventilation mainly normal to the layer drift. Layer drift and strips are removed with a slope of 0.05-0.07 in the direction of movement of the coal pulp. Coal pulp enters the main horizon by pulp’s production, which is erected in the bookmark by [building pulp pipes. After moving the front of the treatment works, by the size of the laying step, the worked-out space is sewn and laid at the entire thickness of the formation. The last two strips are taken out with an increased slope so that the combine can be transferred from one layer to another on its own. For this, the strip is removed in the direction from the layer drift towards the side of the hanging side of the layer with a rise of half the thickness of the layer with a slope. Then, after turning it around, the last strip in this layer in the direction from the hanging side of the formation to the lying one, also with a slope, is taken out. After the combine with its working body from the strip opens the layer drift of the underlying layer and the furnace, the treatment works are stopped, the pipes of the pulp-discharge production are expanded and the worked out space of the layer is completely laid with a hardening mixture. The recess of the next layer is started after sufficient hardening of the erected filling array for transferring the combine. The slope of i bands is determined from the expression

N

where h is the thickness of the layer, m;

m is the thickness of the reservoir, m;

οί - dip angle, degrees;

B - the width of the lay drift, m

Using the proposed method can improve the efficiency of development. The effect is achieved due to colex of techniques and operations. The replacement of conveyor transport of the hydraulic horizons is interconnected by a furnace, which serves for ventilation, the movement of people, laying cables and laying pipes.

The furnace is carried out on the lying side of the reservoir at the border of the future artificial pillar. A powerful steep coal seam within an artificial pillar is worked out and laid in layers in ascending order. In each layer, with the help of a combine harvester, a layered drift from the furnace to the border of the pillar is passed from the lying side of the formation. Then, starting from the border of the pillar, the remainder of the layer is removed with the same combine in strips that have

VNIIPI Order 5780/30, which increases the reliability of the transport link ₍ increases the machine 5Q time of the combine). Coal losses are reduced due to the high purity of the extraction when it is washed off with water. The transfer of the combine from one layer to another is carried out without stopping the extraction process 55 using a compact scheme that allows transferring combine in a single layer. another under its own power on the 'strike limit reservoir space. Due in orienteering bands layer normal to the layers is obtained ^and drifts artificial pillar constant width stable form,

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Branch of the PPP Patent, Uzhgorod, ul.ProektnayaΓΪ

Claims (1)

METHOD FOR HYDRAULIC DEVELOPMENT OF POWERFUL STEEP COAL COAL LAYERS, including preparatory workings, coal extraction by layers with a priority excavation from the layer drift at the lying side of the formation and with the transfer of the excavation machine from layer to layer on the boundary of the excavation section, laying the worked out space with a solid that, in order to increase development efficiency by reducing the cost of fastening, reduce development time and improve safe working conditions, the layers are removed in an ascending order e stripes oriented normal to the layers at the footwall drift layer, the latter two bands are removed with a rise at half power layer in the opposite direction with a slope 1, defined by the formula where L - layer thickness, m; m is the thickness of the reservoir, m; d is the dip angle, deg; B - the width of the lay drift, m. >