1. Introduction 简介

Underground coal mining operations demand electrical cables engineered to withstand extreme mechanical stress, chemical exposure, and the inherent explosion risks present in methane-rich environments. The Australian and New Zealand Standard AS/NZS 1802:2018 provides the definitive framework for reeling and trailing cables specifically designed for underground coal mining purposes, addressing both safety requirements and operational performance criteria.

井下煤矿作业要求电缆能够承受极端的机械应力、化学腐蚀，以及富含甲烷环境中固有的爆炸风险。澳大利亚和新西兰标准 AS/NZS 1802:2018 为专门用于井下煤矿的卷筒和拖曳电缆提供了权威框架，涵盖安全要求和运行性能标准。

This technical bulletin examines the specific applications of Type 260 pliable wire armoured cables in underground coal mines and provides a detailed comparison with Type 241 semiconductive screened cables, with particular focus on their distinct pilot/earth conductor arrangements.

本技术通报探讨 Type 260 柔性钢丝铠装电缆在井下煤矿中的具体应用，并与 Type 241 半导电屏蔽电缆进行详细对比，重点分析两者在导引/接地导体布局方面的差异。

2. Type 260 Cable Overview Type 260 电缆概述

Type 260 cables are copper screened and pliable armoured cables manufactured to AS/NZS 1802 specifications. These cables serve as supply cables where mechanical protection and strength are essential requirements in underground coal mining operations. Notably, Type 260 cables are explicitly excluded from shuttle car applications due to their reduced flexibility compared to other cable types.

Type 260 电缆是按照 AS/NZS 1802 规范制造的铜屏蔽柔性铠装电缆。这类电缆用作井下煤矿作业中需要机械保护和强度的供电电缆。值得注意的是，由于其柔性低于其他电缆类型，Type 260 电缆明确排除了梭车应用场景。

2.1 Construction Features 结构特点

3. Specific Applications in Underground Coal Mines 井下煤矿中的具体应用

Type 260 cables are predominantly deployed in applications where the combination of heavy mechanical protection and reliable power delivery is paramount. The galvanized steel pliable armour layer distinguishes Type 260 from unarmoured cable types, making it suitable for installations exposed to mechanical hazards.

Type 260 电缆主要应用于需要重型机械保护与可靠供电相结合的场景。镀锌钢柔性铠装层使 Type 260 区别于非铠装电缆类型，适用于暴露于机械危险的安装环境。

3.1 Primary Application Scenarios 主要应用场景

3.2 Exclusions and Limitations 排除项和限制

Type 260 cables are explicitly not suitable for shuttle car applications. Shuttle cars require cables with superior flexibility to accommodate high-speed reeling operations and constant flexing cycles. The pliable steel wire armour, whilst providing excellent mechanical protection, reduces the overall cable flexibility below the threshold required for reeling drum applications. Type 275 cables are specifically designed for shuttle car use where anti-corkscrewing properties and flexibility under reeling tension are essential.

Type 260 电缆明确不适用于梭车应用。梭车需要具有卓越柔性的电缆，以适应高速卷绕操作和持续的弯曲循环。柔性钢丝铠装虽然提供出色的机械保护，但会降低电缆整体柔性，低于卷筒应用所需的阈值。Type 275 电缆专为梭车使用而设计，具有抗扭曲特性和卷绕张力下的柔性。

4. Pilot/Earth Arrangement Comparison: Type 260 vs Type 241 导引/接地布局对比：Type 260 与 Type 241

The fundamental distinction between Type 260 and Type 241 cables lies in their construction philosophy, particularly regarding how earth continuity and pilot functions are achieved. Understanding these differences is critical for proper cable selection in underground coal mining applications.

Type 260 与 Type 241 电缆的根本区别在于其结构理念，特别是接地连续性和导引功能的实现方式。理解这些差异对于井下煤矿应用中的正确电缆选型至关重要。

4.1 Structural Comparison 结构对比

4.2 Earth Conductor Philosophy 接地导体设计理念

Type 260: Composite Screen Earth 复合屏蔽接地

In Type 260 construction, the tinned copper braided screen interwoven with polyester yarn serves a dual function: it provides electromagnetic shielding and simultaneously acts as the primary earth conductor. This composite screen surrounds all three power cores, creating a continuous metallic envelope. The earth path is established through this screen, providing low-impedance fault current return capability. This design philosophy prioritises mechanical protection (via the overlying steel armour) whilst maintaining adequate earth continuity.

在 Type 260 结构中，与聚酯纱交织的镀锡铜编织屏蔽具有双重功能：提供电磁屏蔽并同时作为主接地导体。该复合屏蔽包围所有三个电力芯，形成连续的金属外壳。接地通路通过该屏蔽建立，提供低阻抗故障电流返回能力。此设计理念优先考虑机械保护（通过外层钢铠装），同时保持足够的接地连续性。

Type 241: Separate Earth Cores 独立接地芯

Type 241 employs three discrete earth conductors positioned in the interstices between the power cores. Each earth conductor comprises a flexible stranded tinned copper conductor covered with a semiconductive elastomer (maximum volume resistivity of 1 Ω·m). This arrangement provides:

• Individual earth paths for each phase, enabling phase-specific fault detection
• Semiconductive covering that provides protective earth contact for any object breaching the sheath prior to contact with power conductors
• Enhanced flexibility compared to braided screen designs

Type 241 采用三根独立接地导体，位于电力芯之间的间隙中。每根接地导体由柔性绞合镀锡铜导体组成，外覆半导电弹性体（最大体积电阻率 1 Ω·m）。这种布置提供：

• 每相独立接地通路，实现相位特定故障检测
• 半导电覆盖层在任何物体穿透护套接触电力导体之前提供保护性接地接触
• 与编织屏蔽设计相比，柔性更高

4.3 Pilot Core Arrangement 导引芯布置

Type 260: Three Interstitial Pilots 三芯间隙导引

Type 260 incorporates three EPR-insulated pilot cores positioned in the interstices (spaces) between the three power cores. These pilot cores are laid up in contact with the power cores but separated by the semiconductive cradle structure. The three-pilot configuration provides:

• Redundancy for earth continuity monitoring circuits
• Multiple control circuit paths
• Reinforcement strength for extended cable runs

Type 260 包含三根 EPR 绝缘导引芯，位于三个电力芯之间的间隙中。这些导引芯与电力芯接触成缆，但通过半导电托架结构分隔。三导引配置提供：

• 接地连续性监测电路的冗余
• 多条控制电路通路
• 延长电缆敷设的增强强度

Type 241: Single Central Extensible Pilot 单芯中心可伸缩导引

Type 241 features a single pilot core positioned at the geometric centre of the cable, surrounded by the semiconductive cradle. This central pilot is specifically designed as an “extensible” pilot, meaning it is engineered to accommodate the stretching and flexing that occurs during cable deployment and reeling operations. The central position minimises mechanical stress on the pilot during bending cycles.

Type 241 设有单根导引芯位于电缆几何中心，由半导电托架包围。该中心导引特别设计为”可伸缩”导引，意味着其经过工程设计以适应电缆敷设和卷绕操作期间的拉伸和弯曲。中心位置最大限度地减少弯曲循环中导引的机械应力。

4.4 Comparative Performance Summary 性能对比总结

5. Technical Specifications 技术规格

5.1 Type 260 Electrical Parameters (Representative Values) 电气参数（代表值）

5.2 Operating Conditions 运行条件

6. Applicable Standards 适用标准

All Type 260 cables manufactured by Anhui Feichun Special Cable Co., Ltd. comply with the following Australian, New Zealand, and international standards framework:

安徽飞纯特种电缆有限公司生产的所有 Type 260 电缆符合以下澳大利亚、新西兰及国际标准框架：

6.1 Regulatory Framework 法规框架

Installation and use of Type 260 cables in Australian underground coal mines must comply with state-specific mining legislation, including:

Type 260 电缆在澳大利亚井下煤矿中的安装和使用必须符合各州特定的采矿法规，包括：

• Queensland: Coal Mining Safety and Health Regulation 2017 and Recognised Standard 01 (Underground Electrical Equipment and Installations)
  昆士兰州：2017年煤矿安全与健康法规及认可标准01（井下电气设备和装置）
• New South Wales: Work Health and Safety (Mines and Petroleum Sites) Regulation 2022
  新南威尔士州：2022年工作健康安全（矿山和石油场地）法规

7. Cable Selection Guide 电缆选型指南

Proper cable selection requires consideration of the specific application requirements, installation environment, and operational demands. The following decision matrix assists in determining the appropriate cable type:

正确的电缆选型需要考虑具体应用要求、安装环境和运行需求。以下决策矩阵有助于确定适当的电缆类型：

8. References and Further Reading 参考文献与延伸阅读

The following authoritative sources provide additional technical information on mining cable specifications and installation requirements:

以下权威来源提供有关采矿电缆规格和安装要求的更多技术信息：

• Standards New Zealand — AS/NZS 1802:2018 Electric cables for underground coal mining
• Queensland Resources Safety & Health — Recognised Standard 01: Underground Electrical Equipment and Installations (PDF)
• Resources Safety & Health Queensland — Mine and Quarry Electrical Installation Design Expectations
• Business Queensland — Recognised Standards, Guidelines and Guidance Notes for Mining
• Eland Cables — Type 260 Flexible Rubber Mining Cable Technical Data
• Tratos Group — AS/NZS 1802 Reeling Cables for Underground Mining
• Prysmian Australia — Type 241 1.1-11 kV Technical Datasheet (PDF)

9. Contact Information 联系方式

For technical enquiries, quotations, and product specifications, please contact Anhui Feichun Special Cable Co., Ltd.:

如需技术咨询、报价和产品规格，请联系安徽飞纯特种电缆有限公司：