Flexible Bolt Centralizer and Segmented Feed for Confined Rock Bolting
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Solution Overview
Problem
Conventional rock bolting systems face difficulties in tight spaces due to the need to move the entire feed assembly to stabilize the drilling process, making indexing and operation challenging in confined areas.
Innovation Solution
A rock bolting system with independently movable hydraulic stinger, drill feed, and bolting feed, allowing for stabilization and drilling without moving the entire assembly, along with a flexible bolt centralizer for guiding rock bolts and a screen handler for installing screening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the entire feed assembly is moved to stabilize the drilling process, then the drilling stability is improved, but the system becomes difficult to operate in tight spaces and indexing becomes difficult
Solution Approach 1:
The feed assembly is divided into separate independent components: a stinger feed for stabilization, a drill feed for drilling, and a bolting feed for installing rock bolts. Each feed can extend and retract independently, allowing the stinger to stabilize the rock face while the drill and bolting feeds remain retracted for easy indexing and operation in confined spaces.
2Device complexity
If the drill feed and bolting feed are connected together, then the system structure is simplified, but the system cannot operate in confined spaces and indexing is difficult
Solution Approach 1:
The connected feed assembly is segmented into independent drill feed and bolting feed components, each with separate extension and retraction capabilities. This allows the system to operate in confined spaces by keeping feeds retracted when not in use and enables easy indexing of each feed independently.
3Stability of the object's composition
If the entire assembly is moved to engage the rock face, then the stabilization is effective, but the system loses flexibility for indexing and repositioning
Solution Approach 1:
The stabilization function is separated from the drilling and bolting functions. The stinger feed can extend independently to engage and stabilize the rock face, while the drill and bolting feeds remain retracted and can be indexed independently without moving the entire assembly, providing both stabilization and flexibility.
Solution Approach 2:
Each feed component is designed with independent dynamic extension and retraction capabilities through hydraulic actuators. This allows the stinger to dynamically engage the rock face for stabilization while other feeds remain retracted, and enables flexible indexing and repositioning of each component as needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient rock bolting in confined spaces by allowing independent extension and retraction of components, facilitating precise alignment and installation of rock bolts and screening, improving operational efficiency and flexibility.
Implementation Method 1
a hydraulic stinger for engaging a rock face to stabilize the rock bolting system
Implementation Method 2
The bolt centralizer comprises a flexible body capable of elastically flexing from an upright posture for centralizing a rock bolt to a folded posture that permits a bolting feed to advance
Data Source
AI summary
A bolt centralizer for a bolting feed in a rock bolt system has a flexible body capable of elastically flexing from an upright posture for centralizing a rock bolt to a folded posture that permits a bolting feed to advance. The centralizer includes a passage for guiding the rock bolt into a hole drilled by the rock bolt system. The centralizer also includes a base for fastening the centralizer to a sliding carriage adapted to travel over rails of the bolting feed.