Water conservation method for overlying strata water flowing fracture main channel through ground horizontal directional drilling grouting and sealing

Abstract

The invention discloses a water conservation method for overlying strata water flowing fracture main channel through ground horizontal directional drilling grouting and sealing, which is suitable forthe technical field of water resource conservation in coal mining and mine water damage prevention and control. The method includes the following steps: firstly obtaining development characteristic information of the mined height of the overlying strata water flowing fractured zone in a tested area under specific mining conditions; then according to the development characteristic information, determining the distribution range of an aquiclude area of the overlying strata water flowing fractured zone communication stratum corresponding to the water flowing fracture main channel in the tested area; lastly, after determining position and orientation of the water flowing fracture main channel, constructing horizontal directional drilling on the ground and grouting and sealing the water flowingfracture main channel, thereby achieving the goal of reducing water conductivity of the fracture and conserving groundwater resources. The water conservation method has the advantages of simple steps, reliable effect and strong practicability.

Description

Technical field [0001] The invention relates to a water retention method, in particular to a water retention method suitable for ground horizontal directional drilling and grouting in the technical field of coal mining water resources protection and mine water hazard prevention and control technology to block the main passage of water conducting cracks in overlying rock. Background technique [0002] Underground coal mining will cause the movement and destruction of the overlying strata, thereby forming mining fissures in the overlying rock; the overlying mining fissures not only provide a channel for the loss of regional water resources, but also become the geological source of damage to the ecological environment in the mining area. From the general characteristics of the distribution of the water-conducting fissure zone in the overburden rock caused by mining, the "saddle-shaped" raised area of ​​the water-conducting fissure zone is located in the open fissure area of ​​the min...

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Problems solved by technology

However, the above-mentioned methods all have certain limitations. The first type of method will no longer be applicable under the mining conditions of large coal seam thickness, many coal seams, and the aquifer is close to the coal seam; while the second type of method will actually be at a high level The aquifer has moved down to the level of the goaf in coal seam mining, and to a certain extent, the water source for surface vegetation has been dredged. It is necessary to re-use artificial measures to transport the water stored in the goaf to the surface for irrigation in order to achieve the purpose of protecting the ecological environment. The implementation cost and difficulty are greatly increased

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