Supercritical fluid drilling and blasting integrated double-arm drill jumbo and control method thereof

US11634986B2 · kind B2 · utility

Assignees

• HOHAI UNIVERSITY · CN
• POWER CHINA HUADONG ENGINEERING CORPORATION LIMITED · CN

Inventors

• Shaobin HU · 安丰镇, CN
• Yukang Cai · 安丰镇, CN
• Lingzhi XI · Zhejiang, CN
• Huai Yang · Beijing, CN
• Zhengyong Yan · 安丰镇, CN
• Shuogang Pang · 安丰镇, CN
• Qiang Zhang · Dalian, CN
• Lin Zhang · Shanghai, CN
• Chen-Yu Li · New Taipei, TW

Key dates

• Filing date: May 17, 2022
• Grant date: Apr 25, 2023
• Expiry date: May 17, 2042

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21D9/006
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A control method of a drill jumbo is provided. The drill jumbo includes a pre-splitting arm, a drill arm, and a chamber. The pre-splitting arm includes a positioning device, a fixing buckle, a longer rod, an electric telescopic rod, and a water injection opening. The chamber includes a constant pressure valve, an excitation circuit, and a port. A computer controls the positioning device to perform positioning, afterwards, the fixing buckle is opened, the telescopic rod is started, the longer rod is jacked into a position in the hole, and oil is injected into a hydraulic expansion capsule. After blocking of the hole is completed, water is injected into the water injection opening. The port is opened to inject a mixed-phase fluid. The port is closed, the excitation circuit is started, and after a pressure rises to a set value, the constant pressure valve is opened.