Results 31 to 40 of about 469 (202)
矿业科学学报, 2019 In order to smoothly implement gob-side entry retaining and mining without coal pillar in 3207 working face of Nanyang Coal Mine,Shanxi Province,this paper proposes to carry out advanced deep-hole blasting pre-splitting roof near gob side supporting wall.
Hu Tao +6 more
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Meikuang Anquan, 2021 The stability of the roof above the filling body is a key factor affecting the effect of gob-side entry retaining. In view of the problem of roof separation control of gob-side entry retaining at 22301 working face with large mining height in Tunlan Coal
CAO Junwen
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Pressure Relief Mechanism of Directional Hydraulic Fracturing for Gob‐Side Entry Retaining and Its Application [PDF]
Shock and Vibration, 2021 In order to make clear the pressure relief mechanism and application effect of directional hydraulic fracturing for gob‐side entry retaining, the directional hydraulic fracturing was carried out by 400 m in haulage gateway remaining along the goaf in 50108 working face of Hejiata Coal Mine.
Zhang Xiao, Kang Hongpu
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Advances in Civil Engineering, 2019 Gob-side entry retaining is an environmentally friendly nonpillar mining technology with high efficiency and safety. With the continuous exploration of the gob-side entry retained by filling (GERF) with roadside supports, the GERF has enabled nonpillar ...
Enze Zhen +3 more
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Advances in Materials Science and Engineering, 2020 China has a large number of coal resources in “three-soft” geological conditions. The roof of these coal seams is soft and has low strength. Under this condition, gob-side entry retaining can be carried out under the guidance of roof leading holes to ...
Tao Yang, Jie Zhang
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Study of Gob‐Side Entry Retaining Technology with Roof Cutting under Upper Roadway Condition [PDF]
Shock and Vibration, 2021 Gob‐side entry retaining technology with roof cutting (GERRC) has been widely used in flat and near‐flat coal seam conditions, but its application under inclined coal seam is still very deficient. In order to further improve the application system of GERRC and overcome the application difficulties under special geological conditions, this paper takes ...
Xingen Ma +5 more
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Application of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob‐Side Entry Retaining [PDF]
Shock and Vibration, 2021 The gob‐side entry retaining plays an important role in improving working face ventilation, alleviating working face connection, and increasing mining revenue. According to the characteristics of the crossheading roof at the 2103 working face of a mine in Shanxi, a structural mechanics model of the roof was established to derive the theoretical ...
Peng Li +4 more
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Energies, 2023 Gob-side entry retaining by roof cutting, a pillarless mining technique, plays a critical role in maintaining continuous production, rapid connection, and enhancing the coal recovery rate in fully mechanized top coal caving working faces.
Yongkang Yang +3 more
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Advances in Materials Science and Engineering, 2020 The stress concentration of gob-side entry surrounding rock is a hot topic in coal mining. In this paper, through theoretical analysis and numerical simulation, the pressure relief mechanism of the gob-side entry retaining by roof cutting and pressure ...
Yong Zhang +5 more
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Meikuang Anquan, 2022 In order to improve the recovery rate of coal resources in general, Chengzhuang Coal Mine has carried out and implemented the technology of gob-side entry retaining in 5309 large height mining face.
SI Xiaopeng, ZHOU Changtai
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