The way to protect mine land used for planting rice

 

(57) Abstract:

The invention relates to underground coal mining and environmental protection. The essence of the invention is that the way to protect mine land used for planting rice, with underground mining of coal borehole from the surface of the earth drill towards each other by a length of 3 - 5 m and the angle of displacement of sediment forming at the joints wells ditch to save water, the distance between which is equal to step collapse or subsidence of rocks in the immediate roof layer, after which the sides of ditches fasten solutions type of compacted clays, harmless for sprouts of rice. Effect: increase the durability of the fixing of the soil and the efficiency of rice cultivation by providing a collection of water in the rice field and its retention in the vegetation layer of the earth. 1 C.p. f-crystals, 3 ill.

The invention relates to the mining industry, namely to underground coal mining and the environment.

The objective of the invention is to increase the durability of the fixing of the soil and improving the efficiency of rice cultivation.

The essence of the invention is that the way to protect mine land used for planting the Zuya on joints wells ditch to save water, the distance between which is equal to step collapse or subsidence of rocks in the immediate roof layer, after which the sides of ditches fasten solutions type of compacted clays, harmless for sprouts of rice.

Drilling at angles of displacement pumps facilitates the processes of drilling, injection and compaction of trenches in the planes of movement of rocks resulting from underground mining of coal.

The length of the wells 3-5 m is technically feasible at the applicable equipment drilling and injection solutions.

The distance between the ditches, equal step collapse or subsidence of rocks in the immediate roof layer, provides a seal in the gutter most of the cracks formed during underground mining of coal.

As a result of formation of the trenches with walls made of compacted clay no water leaks through cracks and stored in the vegetation layer; the length of the wells and the distance between the ditches provides adequate capacity for water collection and wide coverage of ditches and rice fields; all this serves the protection of the environment and improves the efficiency of rice cultivation.

The proposal is illustrated by drawings.

In Fig. 1 shows the cross section of the mine land acquisition through the thickness of porod under load; Fig. 3 - section II-II - plan of the earth's surface at the level of the soil of the earth.

The method is as follows.

Movement stope 1 leads to the formation of in mined-out space crack rock rocks, which according to the hypothesis arching come to the surface in the direction from the bottom towards the goaf 2 or from out space on the array 3. On the earth's surface cracks are stretched parallel Oistamo slaughter lines 4, forming in the thickness of the corresponding plane. In sediment 5 plane inclined at an angle 6. Specified education planar cracks used for making trenches 7 to collect water 8 and expelling it leaks from plant layer 8 rice fields, which are the sprouts of rice 10. Themselves ditches formed by drilling wells 11 in the planes of movement of rocks in the goaf side and on the array and feed them solutions 12 type of compacted clays.

1. The way to protect mine land used for planting rice, characterized in that the surface of the earth drill toward each other well with a length of 3 - 5 m and at an angle of displacement of sediment forming at the joints wells channels owli layer, then the sides of ditches fasten fixing solutions which are served in the drilled hole.

2. The way to protect mine land used for planting rice p. 1, characterized in that the fastening sides of ditches produce fixing solutions type of compacted clays.

 

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