China University of Mining and Technology

Shanghai Zhenhua Heavy Industries Company Limited

No. 2 Engineering Co. of Cccc First Harbor Engineering Co., Ltd.

No.2 Engineering Company Ltd. of Cccc First Harbor Engineering Company Ltd

Xuejun Wang

Qiang Wu

Wei Xu

Xue Ping Liu

Jianjun Zhang

Yifan Zeng

Ling Zhu

Kai Pang

Weihong Yang

Ming Lin

Bin Xie

Xuan Xiao

Bo Meng

Xinjiang Wei

Hong Xiang

Zhenjie Tao

Zengjun Li

Xiangwei Zhang

Xiangrong Zhou

Mingxiang Wang

Hongbo Wei

Chunfeng Zhu

Gang Yin

Ziyang Bi

Linlin Yuan

Jiangwei Song

Faqiang Su

Dejin Liu

Jinbao Liu

Disclosed is a grouting and water blocking method for a hard rock stratum. The grouting and water blocking method include the following steps. At first, hydrogeological information and coal seam information of a hard rock stratum is obtained. Then, a drilling trajectory of the hard rock stratum is determined based on the hydrogeological information and the coal seam information. Later, at least one drilling device is determined corresponding to the drilling trajectory based on types of multiple rock layers contained in the hard rock stratum. After that, the multiple rock layers contained in the hard rock stratum are drilled sequentially according to the drilling trajectory using the at least one drilling device. At last, in response to determining there is a water leakage area, the water leakage area is grouted.

Grouting and water blocking method for directional hole with large offset in hard rock stratum

The present application discloses a dredging system for a pre-paved gravel foundation bed surface in open sea deep water, including a dredging mechanism, which includes a dredging suction head, a power component and a dredging pipeline, wherein the dredging suction head is connected with the dredging pipeline; the dredging pipeline is communicated with the power component; the dredging suction head includes at least one ridge surface suction port and at least one furrow suction port; the openings of all the furrow suction ports are lower than those of all the ridge surface suction ports; a lifting mechanism, which is connected with the dredging suction head and is used for lifting the dredging suction head to the gravel foundation bed surface; a moving mechanism, which is connected with the lifting mechanism and is used for driving the dredging suction head to move within a dredging range of the gravel foundation bed surface. By the adoption of the dredging system for the pre-paved gravel foundation bed surface in the open sea deep water of the present application, the dredging suction head includes the ridge surface suction ports and the furrow suction ports, and may suck mud on the top surfaces of gravel ridges and the mud in furrows between two gravel ridges at the same time, thereby guaranteeing the dredging quality of the gravel foundation bed surface and improving the working efficiency. The dredging system is simple in structure, convenient to use and good in dredging effect.

Dredging system and dredger for pre-paved gravel foundation bed surface in open sea deepwater

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Beijing, China

Xuejun Wang