公开(公告)号：US11976557B2

公开(公告)日：2024-05-07

申请号：US17890406

申请日：2022-08-18

Applicant: University of Science and Technology Beijing ,  North China Institute of Science and Technology ,  Beijing Anke Xingye Science and Technology Co., Ltd.

Inventor： Sitao Zhu ,  Gaoang Wang ,  Fuxing Jiang ,  Gang Yao ,  Tao Zhou ,  Jinhai Liu ,  Huan Li ,  Zhen Kong ,  Qingbo He ,  Xiaocheng Qu ,  Quande Wei ,  Yitong Huang ,  Shaohua Sun

IPC: E21C37/12

CPC classification number: E21C37/12

Abstract: The present disclosure provides a coal bump control method for sectional hydraulic fracturing regions of a near vertical ultra thick coal seam. The method includes: deepening a main shaft from a mining level to a fracturing level; excavating a cross-hole from a roof rock layer of a coal seam at the fracturing level to enter a coal seam being mined, and excavating a roadway along the strike of the coal seam; and drilling hydraulic fracturing boreholes in a dedicated fracturing roadway along an inclination angle of the coal seam to the coal seam above the roadway, wherein the length of the borehole makes the borehole in communication with a goaf, and the spacing of the boreholes along the strike and the sectional spacing of the boreholes in an inclination direction are designed according to the parameters of fracturing equipments and the fracturing length.

公开(公告)号：US20230160305A1

公开(公告)日：2023-05-25

申请号：US17890406

申请日：2022-08-18

Applicant: University of Science and Technology Beijing ,  North China Institute of Science and Technology ,  Beijing Anke Xingye Science and Technology Co., Ltd

Inventor： Sitao ZHU ,  Gaoang WANG ,  Fuxing JIANG ,  Gang YAO ,  Tao ZHOU ,  Jinhai LIU ,  Huan LI ,  Zhen KONG ,  Qingbo HE ,  Xiaocheng QU ,  Quande WEI ,  Yitong HUANG ,  Shaohua SUN

IPC: E21C37/12

CPC classification number: E21C37/12

Abstract: The present disclosure provides a coal bump control method for sectional hydraulic fracturing regions of a near vertical ultra thick coal seam. The method includes: deepening a main shaft from a mining level to a fracturing level; excavating a cross-hole from a roof rock layer of a coal seam at the fracturing level to enter a coal seam being mined, and excavating a roadway along the strike of the coal seam; and drilling hydraulic fracturing boreholes in a dedicated fracturing roadway along an inclination angle of the coal seam to the coal seam above the roadway, wherein the length of the borehole makes the borehole in communication with a goaf, and the spacing of the boreholes along the strike and the sectional spacing of the boreholes in an inclination direction are designed according to the parameters of fracturing equipments and the fracturing length.