Hydraulic Fracturing Effect on Filtration Resistance in Gas Drainage Hole Area in Coal

Serdyukov, S. V.; Kurlenya, M. V.; Rybalkin, L. A.; Shilova, T. V.

doi:10.1134/s1062739119025432

Cited by 18 publications

(3 citation statements)

References 8 publications

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“…e kinematic viscosity of water υ is 1.142 × 10 − 6 m 2 /s. Drilling slag density is 2.3 g/cm 3 . e density of water is 1.0 g/cm 3 .…”

Section: Checking Calculation Of Pumping Reversementioning

confidence: 99%

“…Drilling slag density is 2.3 g/cm 3 . e density of water is 1.0 g/cm 3 . e vacuum degree P s of the water pump is 65 kPa, ΔP a is 3 kPa, ΔP t is 0, 􏽐 ξ is 1.4, α is 1.1, c s is 21.3 kN/m 3 , and c a is 10 kN/m 3 .…”

Section: Checking Calculation Of Pumping Reversementioning

confidence: 99%

“…e large deformation of the deep mine roadway surrounding rock is mainly manifested as a strong bottom drum phenomenon, and the bottom drum volume accounts for 2/ 3∼3/4 of the amount of the roof and floor moving [1,2]. e research shows that [3,4] the roof and floor of the deep mine roadway and the two groups of surrounding rocks are an interactive organic unity. e generation of bottom drums aggravates the process of the overall destruction of the surrounding rock of the roadway and is the key to the overall instability of the surrounding rock of the deep roadway.…”

Section: Introductionmentioning

confidence: 99%

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Migration Characteristics of Boring Mud in Roadway Floor Anchor Wire Hole and Test in Coal Mine

Zhang

Han

et al. 2021

Advances in Civil Engineering

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Given the difficulty in drilling the anchor holes in the roadway floor of the coal mine, the characteristics of slag movement in the process of positive and negative circulation drilling are analyzed. It is concluded that the interaction between the three zones of drilling and slag is the fundamental reason restricting the rapid drilling of the anchor cable hole in the floor, and it is proposed that the pump reverse circulation drilling can effectively prevent the formation of the three zones of drilling and slag. According to the actual situation, the relationship between drilling depth, vacuum degree of the pump, and the velocity of drilling fluid and the volume of drilling slag is obtained. The results show that the pump suction reverse circulation is feasible for the rapid drilling of the anchor hole of the floor. A set of pump suction reverse circulation drilling systems has been developed, and floor anchor wire hole drilling and slag discharge operation at the same time were realized. The field test shows that the effective drilling time of the anchor cable hole in the depth of 5.6 m can be controlled within 30 min, which solves the problem of deep hole drilling in the anchor hole of the bottom plate and purifies the working environment.

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“…e kinematic viscosity of water υ is 1.142 × 10 − 6 m 2 /s. Drilling slag density is 2.3 g/cm 3 . e density of water is 1.0 g/cm 3 .…”

Section: Checking Calculation Of Pumping Reversementioning

confidence: 99%

Section: Checking Calculation Of Pumping Reversementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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